A cylindrical bar magnet is Rotated about its axis. A wire is connected from the axis and is made to touch the cylindrical surface through a contact. Then,

(a) A direct current flows in the ammeter A

(b) No current flows through the ammeter A

(c) An alternating sinusoidal current flows through the ammeter A with a time period 2π/ω

(d) A time varying non-sinusoidal current flows through the ammeter A

5 Views|Posted 8 months ago

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Answered by

Payal Gupta | Contributor-Level 10

8 months ago

This is a multiple choice answer as classified in NCERT Exemplar

(b) When cylindrical bar magnet is rotated about its axis, no change in flux linked with the circuit takes place, consequently no emf induces and hence, no current flows through the ammeter A.

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